Tire trimming machine



Oct. 18, 1932. J. l. HAASE TIRE TRIMMING MACHINE Jorge I. Hmne Oct. 18,1932. J. l. HAASE Y TIRE TRIMMING MACHINE Filed Sept-. 2l, 1928 5Sheets-Sheet 2 J. l. HAASE TIRE TRIMMING MACHINE Oct. 18, 1932.

Filed Sept. 21. 1928 5 Sheets-Sheet .maw

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oct. 41s, 1932. J. l. HAASE 1,883,729

TIRE TRIMMING MACHINE Filed sept. 21, 1928 5 sheets-sheet 4 204 g 202 l2z 201 J' organ-1. Hanse Oct. 18,519.32. J. l. IMASE'` TIRE TRIMMINGMACHINE Filed Sept. 2l, 1928 5 Sheets-Sheet www @un MQW Patented Oct.18, 1932 'parte` rarn- Parr rive (IllEti''EIil'y I. HAASE, OF AKRON,OHIO 'i I TIRE TRIMIVIKING MASI-IIN E n Application ledSeptember-21rg1928. Serial No. 307,363.k

The invention relates to tire trimming machines, and it has particularrela-tion to a machine of the above-d which shall especially beesignated character applicable for trimming solid or cushion rubbertires to predetermined dimensions.

annular base.

One of the most common methods employed in the manufacture of cushionand solid tires comprises the extrusion of unvulcanized rubber stockwhich, thereafter, is

cut into strips of Vpredetermined weight. The strips then are disposedin endless relation about annular base bands.

known by those skilled in the art, that the weighing and cutting ofrubber to obtain aproper lquantity for the construction of a tire is avery tedious and difficult operation and usually several attempts aremadefbefore a strip having the proper weight is secured.

According to this invention, the cutting and weiohinw of the rubber inexact uanti-V annular tire supporting bases.

Following this operation the tread and side portions of the tire aretrimmed tov predetermined Adimensions in order to obtain a desiredvolume of material on each base band. The machine employed for thesepurposes comprises essen! tially a rotary support for the tiresupporting base band with the tire applied thereon,

and a band saw which is operable transversely to the tire for Vseveringor trimming excess materialV from the tr ead portion thereof.

Other cuttingor trimming devices likewise are embodied in the ma chinefor trimming the sides of the tire to predetermined width.

VFor a better [understanding of the invention, reference may now behadto the accompanying drawings, forming a part ofthe specication, ofwhich:

Figure l is an elevati onal view ofva ma- It is well' chineconstructedvaccording to oneembodiment of the invention; V

-Fi'gure 2 is a cross-sectional View taken substantiallyalong the lineII-H of Figurel; A f

4 Figure 3 is a view'of one of the-clutches employed between the. rotaryVtire support and the motors. f,

Figure l is a perspective view of one end of a rod employed forexpanding the tire 6G supporting means; l Y

Figure 5 is a view of the braking means employed,following,de-energization of the driving motor, for stopping therotation of the shaft on which a tire is supported; Y Figure 6 is across-sectional view, on alarger scale, of the; swivel` connectionemployed between. the tire'support expanding rod and a rod forming partof a fluid operated reciprocating motor; Y`

Figure 7 isa cross-sectional view, taken substantially along the lineVil-VIIl of Fig. l, of the mechanism employedfor trimming the tread of atire; Y

VFigure@ is a cross-sectional view of the tread trimming mechanism takensubstantially along the line VIH-vill of Fig. l;

Figurev 9' isa cross-sectional View taken substantially along the lineIX-'IX of Fig. 8;

'Figure l0 is an elevational view, partly in cross-section, showing themechanism employed for trimming the sides of a tire;

Figure l1 is a plan view of the mechanism illustrated by Figure 9 ;v A YFigure 12 is a fragmentary elevational view vtaken from the right sideof the portion of the machine illustrated by Fig. l0; and i Figure 13 isa diagrammatical'illustration of the electrical apparatus embodied inthe machine. K Y

' In practicing thev invention, according-to one of its severalembodiments, an elongate base 20, intermediate its ends, supports avertically disposed frame 2l having vertically disposed yoke members 22and 23 projecting upwardly therefrom. A motor 25 supportedv on tl e base20, adjacent the frame 2l, is pro-vy vided witha shaft 26 on which isrigidly 'seioo cured a pinion 27 that meshes with a gear 28 rigidlymounted on a shaft 29 supported in a bearing bracket 30 on the frame 2lbetween the yoke members 22 and 23. A pinion 31, keyed to the outer endof the shaft 29 in turn, meshes with a relatively large gear 32 that isrigidly secured on a housing 33 of a roller clutch 40. This housing hasan inwardly eX- tending flange 35 on one side and a cap 34 bolted to itsother, which flange and cap are journalled on an elongate hollow shaft36. Spaced bearings 37 and 38, on the upper ends of the yoke members 22and 23, respectively, support the ends of the shaft 36.

A sleeve 42, rigidly secured upon the shaft 36 between the cap 34 andthe flange 35 (Fig. 3) is provided with circumferentially spaced teeth44, each having corresponding radially directed surfaces 46 andsubstantially tangential surfaces 45. Roller bearings 48 are providedbetween the sleeve 42 and the housing 33 and in the present instancefour of such bearings are disposed between each pair of the teeth 44. j

When the gear 32 is rotated in a clockwise direction, referring toFigure 3, the rollers immediately adjacent the tangential surfaces ofthe teeth 44 will be wedged between such surfaces and the innerperipheryof the clutch housing 33, and will .cause the gear 32 to drive thesleeve 42 and consequently the shaft 36 secured thereto. On the otherhand, if the sleeve 42 alone is rotated in a clockwise direction, itwill carry the roller bearings freely around the inner periphery of theclutch housing without imparting any rotary motion to the gear 32.

The shaft 36 also is adapted to be driven by a second motor 50, (Fig. 2)which is supported at one side of the yoke member 22. A pinion 51, keyedto the shaft 49 of this motor, meshes with a gear 52 rigidly secured ona shaft 53 which is journalled in a housing 54 mounted on the bearing 37and secured thereto by stud bolts 55. Within the housing 54 the shaft 53is provided. with a worm 56, which meshes with a worm wheel 57 rigidlymounted on a transversely disposed shaft 58 also'journalled in thehousing 54. A pinion 59, keyed on one end of the shaft 58 externally ofthe housing 54, meshes with a relatively large gear 6() mounted upon aclutch 70, which is similar in construction to the clutch 40,associated, as hereinbefore described, with the shaft 36 and the gear32.

The shaft 36 is retained in the bearings 37 and 38 by lock nuts 6l and62 engaging the end thereof adjacent the bearing 37, and a centrallyapertured circular plate 64 threaded on the opposite end of the shaft,as indicated atA 63. The plate 64V adjacent its outer edge is secured bystud bolts 65 to a relatively large centrally apertured disc 66. Gn theopposite face of such disc, and adjacent the outer periphery thereof,radially disposed and equally spaced slots or channels 67 (eight beingemployed in the present instance) are provided. Adjacent its center thedisc 66 is provided with allange 69, and a relatively large circularrecess 68 is formed between this flange and the inner ends of the slots67. Radially disposed semi-circular openings 71, equal in number to theslots 67 provided in the flange 69, have their centers coinciding withthe radial center lines of the slots. llnwardly of the openings 7l, theflange 69 is provided with enlarged semi-circular openings 72, whichhave their centers in turn coinciding with the centers of the openings7l.

Longitudinally apertured screws 74 disposed in the slots 67 are threadedat their outer ends into internally threaded bosses 76, which areslidably disposed in the outer i portions of the slots. These bosseshave integral tire engaging jaws 77 on their outer ends.

At their inner ends, the screws 74 project into and are journalled inthe openings 7l. The ends of the screws abut blocks 8l, disposed in theopenings 72, and are secured to the latter by bolts 78, extendingthrough apertures in the screws, and having heads 79 engaging the outerends thereof. The blocks are provided with reducedportions 82,permitting their slidable movement in the openings 7l, which areencircled by springs 83, abutting at one end the larger portions of theblocks 81, and at their other ends, shoulders 84 on the flange 69. Inaddition, each of the blocks 8l, on its inner side, is provided with asemi-cylindrical recess 86 in which a roller 89 is disposed. A. cap 85employed on the outer side of the flange 69 and provided withsemi-circular openings 88 and 89, supplementary to the aforesaidsemi-circular openings 71 and 72 in the flange, respectively, is securedto the flange by stud bolts 87, in such position that it retains thescrews 74 and the blocks 8l in proper positions.

The screws 74l adjacent their inner ends have integral bevel gears 90,disposed within the recess 68 in the disc 67, which mesh withY arelatively large bevel gear 91, rigidly secured on a stud shaft 92,disposed in ali-gnment with the shaft 36. This shaft is rotatablysupported in a cover pla-te 93 that is secured to the disc 66 by bolts94 (Figure l). At its outer end the shaft 92' is provided with a handwheel 95 and a -dial 96 which slidably engages the front surface of thecover plate 93. rThe dial 96 and the cover plate 93 are provided withsuitable indicia for facilitating the determi-nation of the angularposition or movement of the hand wheel. The operation of the hand wheel95 results in the rotation ofthe gear 91 and, in turn, the bevel gears90, thus rotating the screws 74 with respect to the bosses 76, andconsei'o I igssavae Y an inclined surface 98 lon the outer peripheryofthe dial 96, and a flange 99 on the cover,I

is secured by a bolt 100 projecting through the wedging member in orderto prevent or to permit kthe rotation of the hand wheel.

The rollers 80, disposedin the openings86 inthe blocks 81, are adaptedto traverse the.

surface of a cam 101,Y secured on the outer end of a rod 102, that visslidably supported in bushings 103 and 104 disposed `in the oppositeends of the hollow, shaft 36. This cani` (Fig. 4), in the presentinstance, has eight surfaces indicated at 105, that are parallel to theaxis of the rod 102, and a similarv nurnber of inclined surfaces 106vprojecting inwardly therefrom. 'Longitudinal Vmovement of the rod 102with respect to the rollers .80 moves the blocks 81 against the actionof the springs 83, thus displacing the' jaws 77 by radial distancescorresponding to the difference in slope at various points on the'surfaces k of the-cam 101.

Y At its opposite end, the rod 102 is connected to a plate 107 (Fig. 6)which abuts a spacing disc 108, disposed between such late and a plate109 secured to a second rod T110. The plates107, 109, and the. disc 108are'retainedVv in abutting relation by a housing 112 comprising an upperpart and a lower part bolted. together as shown by Fig. 2

Ywhichlpermits rotationof the rod; 102 with. I respect to the rod Theopposite end` of j the latter rod is secured to a reciprocating' pistonof la fiuid'motor 113, thatis mounted on a bracket 114, secured bybolts11'5 to the frame 21. YFluid underr pressure for actuf ating themotor 1131s supplied by conduits 116 and 117 which are connected theretoon opposite sides of the piston. The conduits in;

turn are connected to a fluid supply .conduit 126 (Fig. 7) by a valve127 which is operated by a handle 128.

' 1n order to prevent the housing112 from rotating with the rods 102 and110, rollers 118 are mountedon'opposite sides thereof,

which rollers engage brackets 119 extending n vertically from thebracket 114. The housing 112 also is provided with alug 120 that isadapted to engage an arm 121 forming party of a-normally` openelectrical contact switch 122. f

A brake 125 (Fig. 5),.is 'provided in order to' stop the shaft 36 fromrotating, following the de-energization of either ofthe motors 25 or 50.The brake comprisesy a band 130y that surrounds the outer peripheralsurface of the plate 64 on theouter end of the shaft 36. This band issecured at one end to a pin 131 mountedon an integral upper extension132 onthe bearing 38, and at itsother end is:k secured toa pin 133extending from the low-V er end of an arm'135-r that is keyed Ato a pin136 which .likewise is ,rotatably disposed in such extension. An' arm138, rigidlysecured on theopposite end of the-pin 136 ispivote allyconnected at its opposite end by Ya pin 139, to a vertically dependingrod 141. At

its lower endthe last mentioned rodis 'adjustably secured to a footpedal 142 (Fig. 1)

which is pivoted intermediate its ends upon a Vpin 143, secured in abracket 144 supported on the base 20.

Oneend of the base 20 slidably supports lan auxiliary basef which ismaintained thereon by gibs 151 engagingv oppositely disposed guidesurfaces 149 on the former.

Movement of the auxiliary base, relative to the base 20, is effected bya screw'155 disposed ina longitudinally extending cavity l in the uppersurface of the latter base, which projects through a threaded opening156 in a lug 157 on the lower side of the auxiliary j,

base. The screw 155 adjacent the end of the base 20 is journalled in abearing 165 in the Y thereof, is identical with a clampfprovided andshown by Fig. 12, andl will be described in relation to that figure. Y

' On its upper surface the'base 150 is providedwith a pair ofr integral,vertically extending frame members and 191 which arespacedlongitudinally of the base. Vertically disposed webs 192, integralwith both of the frame members andthe base, are employed for reinforcingthe'framemembers.

The auxiliary lbase also supports a motor 200 having a'verticallydisposed shaft 201 which is connected by a coupling 202 to a secondvertically disposed and relatively long shaftV 204, having a key 205extending throughout its length. f Afsleeve 206 slidable on the shaft204, but keyed thereto, is rotatably supported in a bearing bracket 208and is retained therein by a flange 209 on the upper'end of the sleeve,land by nuts 203 and 207 threaded on its lower end. The bracket issecured by stud bolts 2107to the end of a L' pair of registering flanges211 and 212 (Fig.

9) integral with the upper ends of a pair of slide members 215 and 216respectively,thatv are disposed between the frame members 190 and 191,respectively'. rEhe upper and registering portions of the slide members215 and 216 are secured together byv a plurality of bolts 220 and nuts221 whereas the lower portions ahut the adjacent surfaces onvthe framemembers 1901'and :191. The slide member 215 is retained between the sideedges of the frame member 190 by guide plates 225 and 226 bolted to theedges of the frame member by bolts 227 and 228, respectively, while theslide member 216 is retained between the side edges of the frame member191 by guide plates 231 and 232 bolted to the edges of the frame memberas indicated respectively at 234 and 235.

The slide members 215 and 216 are verl tically reciprocated by a fluidpressure motor 240 (Fig. 8) which is mounted therebetween on the base150. This motor comprises an ordinary reciprocating piston 241, slidablydisposed in a cylinder 242 and joined to a piston rod 244, which rod inturn is secured at its upper end by a coupling 246 and bolts 247 to thelower side of the upper and registering portions of the slide members,215 and 216.

` Fluid under pressure is transmitted to the motor 240 by conduits 250and 251 (Fig. 7)

`which, through a valve 254, communicate with guide member 225 by bolts271, by means of acam 274 integral with the slide member 215Y which isadapted to engage an arm 261 of the switch. A laterally extending recess280 is provided between the upper and registering portions ofthe slidemembers 215 and 216 which is open adjacent the end of such membersopposite the bearing bracket 208. rllhis recess slidably receives a bar281 which, at its outer end, is provided with normally ext-endingapertured ears 283 and 284 through which elongate bolts 288 and 289project. T he bolts 5, have threaded inner ends which engage lugs 291and 292 integral with the adjacent of the slide members 215 and 216,respectively. Other apertured ears 300 and 301 projecting outwardly fromti e end of the bar 2813 receive within their apertures a horizontallydisposed pin 302 which pivotally supports the lower end of a stud shaft303. An arm 304, integral with the lower end of the shaft 303 andprojecting in alignment therewith is provided at its lower end with aneye 305, which is adj ustably connected to an arm 307 depending` fromthe end of the bar 281, by an eye bolt 308. i pin 309 rigidly securedbetween a pair of lugs 310 at the lower end of the arm 307 pivotallysupports one end of the eye bolt while the opposite end thereof isadjustably secured tothe eye 305 of the shaft member 303 by nuts 312 and313. The shaft 303 rotatably supports a pulley wheel 320 having flanges321 and 322 on its outer periphery which retain an endless band saw325therebetween. The saw in turn is trained about a second pulley wheel326 secured to the upper end of the sleeve 206 by bolts 327 whichproject through the wheel and into the flange 209.

A sprocket wheel 329, Vdisposed above the pulley 326, and slidablymounted on the keyed shaft 204, is retained by a finger 331 secured onthe pulley by one of the aforesaid bolts 327 in a position adjacent thepulley.' Over this wheel a chain 332 is trained which engages a sprocketwheel 335 rigidly secured to a vertically disposed shaft 340. The latteris rotatably 'supported in horizontally disposed legs 341 of a bracket342 bolted at its base to a vertically disposed angle plate 345. angleplate in turn has an off-set outwardly extending portion 347 at itslower end which is secured by bolts 349 to a horizontal portion 350 of aframe 351.' This frame is composed of a horizontally disposedintermediate portion 357, a pair of vertically disposed portions 358 and359 proj eating upwardly from the opposite ends thereof, and a pair ofhorizontally disposed portions 350 and 360 projecting outwardly from theupper endof the latter, re-

' spectively. 'F he base portion 357 of the frame is secured to the topsurfaces of the frameV members 215 and 216 by bolts 362.

Intermediate its journalled ends the shaft 340, is provided with a worm370 meshing with a. worm wheel 371 secured to one end of a shaft 372,one end ofwhich is journalled'in the vertical portion of the plate 345and the opposite end, in an angle plate 375 identical to the plate 345but disposed oppositely thereto. portion 377 which is secured by bolts376. to the portion 360 of the frame 351. A roller 379 is rigidlydisposed on the shaft 372 between the plates 345 and 37 5. A. secondshaft 385 provided with a similar roller 386, has its ends journalled inthe upper ends of arms 387 and 388, that are provided with slotted ends390 (Fig. 1) through which bolts 391 and 392 project and adjustablysecure the arms to the adjacent surfaces of the plates v345 and 375.ldling rollers 394 and 395 disposed in spaced relation to the rollers379 and 386 and supported on shafts l398 and 399, respectively, arejournalled in the ends of arms 400 and 401 rigidly secured by bolts 405tothe plates 345 and 37 5. A belt or conveyor 407 is trained over all ofthe aforesaid-'rollers in driven relation thereto.

' A bar 410 secured to a vertically extending side portion 411 of theframe 351, rotatably supports a plurality of grooved discs 415 whichengage the upper edgeof the band saw and prevent its upward movementduring its operation lVertically disposed rollers 416 and 417, rotatablysupported in blocks 419 and 420, secured by bolts 4217 to the ends ofthe bar 410 engage the outer side of the band saw and maintain it inalignment The rl`he angle plate 375 has a' with the grooves in the discs415. A fiuid supply. conduit 425 also mounted on the bar 410y hasindividual nozzles 426 whose ends terminate adjacent the discs 415 forsupplying` a fluid tothe band saw for facilitating the tire trimmingoperation.

Aframe 430 is mounted on the ends of the base 20 opposite the auxiliarybase 150 and like the base 150 it is provided with gibs 431 disposed onopposite sides of the base 20 which-engage complementary guide surfaces432 thereon. Slidable movement of the ,frame 430 relative to the lbase20,is effected by a screw v434 threaded into an apertured lug 435integral with the `lower side of the frame and which adjacent itsouter-end is journailed in a bearing 437 on the base. A hand wheel 438riOidly secured to the outer end of the screw 434 for operating thelatter is provided with notches 439 on its periphery that are adapted tobe engaged by a finger 441 to govern the rotary movement of the handwheel. The screw 434 also'is providedwith a clamping device'442, similarMovement of the carriage 450relative to the frame 430 is effected by vanarmf452 integral with the carriage and projecting therebeneath centrallyof the webs 447`of'the frame. The arm is connected to links 453 and 454a pin 456 journalled in an open`- ing inthe arm and projecting throughapertures in the upper ends of the links." Aper-v tures formed in theopposite ends of the links 453 and 454 receive a second pin-458 which isjournalled therebetween in thesfree end of a crank arm 460 formedintegral with a shaft 461 journalled in bearings 462 and 463 in theupper endsv of the frame legs 443 and 444` respectively. Operation of fthe shaft 461 is effected by a hand lever 465 secured to one end thereofand disposed on' the outer side of the frame 430. In Orderto retain thehand lever 465 in either of two limited positions, a segment 466 securedby bolts 467 to the outer side of the frame 430, adj acent the lever465, has a pair of spaced notches 469 and 470 which are adapted to beengaged byl the lower end offa Vlatchrod 472 slidably and resilientlylmounted longitudinally Aon. thehand lever. f

VA screw 480 mounted transversely ywith Vrespect to the carriage 450 anddisposed above theupper surface thereof,` has its ends journelled inbearings 484 and 485 on theopposite sides'of the carriage. This screwhas one halfof its length' threaded one direction as indicated at 481,and its other half threaded in an opposite direction, as indicated at482. The outer end of the screw ladjacent the bearing 484 has a pinion486, 'rigidly secured thereon, and outwardly of the pinion, a clamp 487,adapted' to secure the screw in any adjusted position.v As best shown byFig. 12, the clamp 487 lcomprises a forked member 488 secured at itsendop- Vposite the fork, to a pin 489v onthe carriage 450. Spaced arms490 and 491 comprising the fork, have complementary and adjacentsemi-cylindrical recesses (not shown) adapted to bevclamped about acylindrical portion of the screw 480. Movement of the -arms 490 and 491relative to each other is effected by a. screw member 492 which fhas anenlarged outer cylindrical portion 493 abutting the end of the arm 491and a reduced threaded portion which loosely projects through an openinginthe arm 491v and is threaded into an opening inthe arm 490.`

, The extreme outer end of the screw is provided with a hand wheel 494and a handle 495 by which itis manually operated. The outer periphery ofthe wheel has a Vplurality of notches 496 adapted to be engagedby aVfinger. 497 securedfby screws 498 to a portionof 1 the bearing 484. Apairi ofcrossheads 500 and 501 having internally threaded and laterallyextending openings 502 yand 503 respectively are mounted on ythethreaded portions 481 and 482 of the screw respectively, and are adaptedto be moved relative to each other by rota-tion ofthe screw 480 by thehand wheel 49.4. l

A second shaft 510 (Figs. 1 and 11) disposed parallel to the screw 480but spaced therefrom toward the opposite endof the base 2O is journalledin .bearings 511 and V512, disposedon opposite sides of thevcar-v riage450 adjacent. the bearings 484 and 485 respectively. The outer end ofthis shaft adjacent the bearing 512, is provided with a rigidly securedoperating handle 514 by means of which the shaft 510 maybe turned. Asegm-ent 515 rigidly secured to the inner side vofthe handle at vtheinner end of the latteris provided in its outer portion with a radiallydisposed slot 517. When the handle Yis ina position substantially 180degrees removed from its position shown by Fig. 1, the slot 517 issubstantially'aligned with a lug 518 Vintegral with the outer end of abracket v519 secured by bolts 520 to the frame 430.

Hence with the segment 515 in the latter position the notch 517V isadapted to receive the lug 518 upon movement of the carriage 450relative to the frame 430.

. The oppositeend of the shaft 510 is provided with a pinion 525 (Fig..11) which may Vbe rigidly secured tothe shaft bya key 526 orbe free torotate relative to the'shaft upon V'removal of the key. This pinionmeshes with the pinion 486 disposed on the end of the screw 480.

rlhe shaft between the bearings 511 and 512 is provided wit-h a key 527extending on the shaft 510 for rotation therewith but capable ofslidable movement relative thereto. This pinion meshes with a rack 538,which is disposed atan angle to the plane of the pinion 536, althoughthe teeth on its lower side are disposed in parallel relation to teethin the pinion. The rack is mounted on the lower side of a carriage 541which has inclined guide surfaces 542 and 543, which engage gibs 545 and546 on the crosshead. These guide surfaces and the gibs also aredisposed parallel to the rack 538. Movement of the carriage relative tothe cross-head in a direction toward the opposite end of the base 20, isadjustably limited by an angle bracket 551 (Fig. 11) secured by bolts553 to the outer side of the crosshead. A portion 555 projectingnormally to the base of the bracket is provided with ascrew 557projecting into the path of movement of the carriage.

Thecarriage 541 at one side thereof is provided with a boss 561 havingavertically disposed aperture as indicated at 562, through which a pin564 projects. rlhis pin has an enlarged head 565 on its lower endabutting the lower side of the boss and a vertically extending,diametrically disposed, slot 568 in which knife 569 is slidably mounted.rlhe knife is lsecured in the slot against the upper surface `o-fthebossby a set screw 570 threaded into an I50 the opening, which is identicalwith the pinion 536. This pinion meshes with a rack identical with therack 538, which. is secured to the lower side of a carriage 540 slidablydisposed on the cross-head-500and retained thereon in the same manner asthe carriage 541 is slidably disposed and retained on the cross-head501. The carriage 540 also supports an aper- Ytured boss 560 on its sideadjacent the carriage541, -in the aperture of which a pin ysimilar tothe pin 564 is mounted. A-knife identical to the knife .569 vandprojecting through a diametrical slot in the pin, above the boss, isretained therein by a set screw engagingrthe upper end of the pin, andthe knife. l` he carriage 540 and the rack thereon,

are slidable in the cross-head 500 at an angle to the planes of thepinions mounted on the shaft 510, but in a direction opposite to thedirection in which the carriage 541 is movable, u and in a divergingrelation thereto. Similarly, the cross-head 500 has an angle brackettending parallel to the plane of the pinion 536 i" and secured by bolts611'to its upper surface.

A shaft 612 journall-ed in the bracket is relatively longer than thebearing portion thereof, and hence may be movedlongitudinallyr relativethereto. On one end the shaft has a crank 613 and on its other an arm614, carrying a knife 616 secured thereto by bolts 61'5. The arm 614normallyis retained in its position shown by Fig. 10 by a bar 620,bolted to the bearing bracket as indicated at 621, which has an endnormally disposed beneatn the arm 614 and in contact therewith. Movementof the crank 613 in a counter-clockwise direction is limited by a bar625, secured by bolts 626 to the cross-head 501, which has a set screwY627 disposed in the path of movement of the crank 613 when the arm 614is clear of the bar 620.

Like the cross-head 501, the cross-head 500 ,l also is provided with abearing bracket 580 secured thereto by bolts 582. A shaft 585 journalledin the bracket and relatively longer than the bearing, hasa crank 586 onone end, and an arm 587 on its other, which is pro-vided with a blad-e588 secured thereto by bolts 589. The arm 587 normally is retained inits position shown by Fig. 10, by a bar 591.5 secured by bolts 596 to aportion of the bearing bracket 580 and normally projecting below the armand in Contact therewith.V The latter however, by moving the shaftlongitudinally with respect to the bracket, may be moved relative to theshaft 585 in order to clear the arm from the end thereof and permit itsrotation with the shaft. Thei cross-head 500 adjacent the crank 586, isprovided with a bar 60.0 secured thereto by bolts 601, which, at itsouter end, has an adjustable set screw 603 projecting therethrough. Thisset screw is disposed in the path of movement of the crank 586 when theshaft 585 is in such position that the arm 587 is clear of the bar 596,and is adapted to limit the clock-wise movement of the crank. Y

Movement of the carriage'450 relative to the frame 430 alsooperates anelectrical contact switch 635 securedV to the side' of the frame 430`adjacent the hand wheel 496, and which has a switch arm 637 inthe pathof y movement of a switch operating vcam 640 secured' to the under sideof the carriage 450 adjacent the hand wheel. y I v Fig. 13 discloses adiagram of the electrical circuits provided for automatic operation ofthe motors 25, 50 and 200 employed for drivinO' the tire supportingchuck and the band saw- 825 respectively. `llllectrical conductors 7 60,761 and762 connected to main electricalsup'ply conductors, lead toterminals 7 63, 764 and 7 65 of a-three-pole switch 7 59. Otherconductors' 766, 777 and 778 respectively connect the Vopposite.terminals' 769, l770, 771 of the switch to the terminals of the motor200. rlhe' bridging element 8110 adapted to connect the correspond ingterminals of the switch 7 59 is operated by a solenoid 779 which'has onetermina-l connected by a conductor 780 to the conduc tor 7 60 and itsother terminal connected by a conductor v7 81 to one terminal 782 of thesingle-pole switch 260. which normally is Vmaintained open by a spring750. The oth- Yer terminal 788 of the switch 260 is 'conn ected by a.conductor `7 841 to the conductor 761. The switch 260, which is operatedby the downward movement of the bar 266 on the frame member 191completes a circuit through the solenoid 779, which in turn closes thethree-pole switchv 7 59- and thus energizes the motor 200. l f

The conductors 766, 777 and 778 also are connected respectively byconductors 785, 786 and 787 to 'terminals 788, 789, v 790 of athree-pole switchn7 91. IThe motor 50 is connected by conductors 792, 798' and 794 to the other terminals 795, 796, 1797 of the switch.@pera-tion ofthe switch 791 is elected by a solenoid 798, one terminalof which is connected to the conductor 785 and the other terminal by aconductor 800 to one terminal 801 of a switch 122 normally maintainedopen by' a spring 751. The other terminal "8020i the latter switch isconnected by anal of which is connected by a conductor 822 totheconductor 806 while the other terminal is'connected by a conductor 828to one terminal 824 of a switch 270 normally'maintained closed by aspring 752. The other terminal 8250i the latter switch is also connectedby a conductor 826 to aterminal 827 of a switch 635 normally maintainedopenby Ya spring 7 53, while the other Vterminal 828 of theV latterswitch is connected by-acon-` are contracted, that is, the rollers are'at rest adjacent the inner ends of the inclined surfaces 106 of the cam101. Blocls700 are now disposed on the outer peripheral .surfaces of thejaws 77 whereaftera tire base 701 having an. extruded ring of rubber702.V thereon, is mounted on such blocks. Rotation of the hand wheelmoves the'jaws 77 radially outwardly until ythe blocks 700 firmly engagethe innerperiphery of the base band. f. The position of the hand wheelis now noted* Y whereafter itis loosened suiiiciently. to permitvremoval of the blocks 700 from between the base band of thev tire andjaws'77. The thickness of the blocks in a radialdirection is such'thatwhen removed, vmovenfient of A the cam 101 thereafter to its positionshown by Fig. 2 in which position the surfaces 105 are in'contact withth-e rollers 80, firmly en-y gages the jaws 77 directly with the innerpethe cam 101 and therod 102 also results in the closing of the switch122 as has been previously described. 1 .V

The band saw mechanism is nowadjusted `riphery of the base band 701.-Movement of Y toward the tire in predetermined distances nism is movedvertically downwardly by opy,

eration of the fluid motor 240 to a position in which the saw isldisposed in a horizontal plane substantially coinciding with the axis oithe tire support. Movement of the band tion of the motor 200 by reasonof the iact that the cam 266closes the'switch260 which completes, acircuit through the solenoid 779, which in turn closes the three-poleswitch 759 and thus .completes a circuit from the i conductors 7.60, 761and 762 to thermotor.

Since the switch. 122 is closed owing to the position of thecam 101 androd 102, as previously referred to, closing of the switch 759 alsocompletes a circuit through the solenoid 798 whichv results in theclosing of the switch '.791 and energization oi the motor 50; En-

ergization of the motor 200 resultsin operation of the band saw 825about the pulleys vsaw mechanism downwardly causes energiza- 320 and326, whereas energization oi the motor 50 results in rotation of thetiresupporting chuck at its lower rate of speed.- The downward movementof the band saw mech# anism aise brings the band saw intoan operaj tiveposition with 'respect tofthe'rotating tire and the tread is trimmed:from the latter.V

`ly to the rim.

Following the trimming of the tread the band saw mechanism is returnedto its inoperative position which movement permits the switch 260 to.open thus cle-energizing the solenoid 779, opening of the switch 759,and Cle-energizing the motors 200 and 50.

The hand lever 465 is now moved from its lower to its upper positionwhich movement affects a movement of the carriage 450 and the closing ofthe switch 685V by the bar 640. Since the band saw mechanism is in itsupper position, the cam 274 thereon is free from contact with the switch2'4'0 and consequently the latter is closed. With the switches 2?0 and685 closed, a circuit is completed through the solenoid 821 whichresults in closing of the three-pole switch 812 and energization of .themotor 25. At this time or prior to the movement of the hand lever 465the knives 569 areadj usted with respect to their snpports andthereafter the hand wheel 494 is operated to adjust the cross-heads 500and 501 to predetermined positions. Depending upon the angle at whichthe sides of the tire .are to be trimmed, the key 526, which causesoperative engagement of lthe pinion 484 on the screw 480 with the pinion525 on the shaft 510, is either removed or retained in. position. Thehand lever 514 is now moved to the position shown by Figure 1. Theknives 569 dur- -infr themovement of the lever 514 progressively trimthe edges of the tire approximate- Thereafter the lever 514 is moved toits former position and the shafts 585 and 612 are moved longitudinallyuntil the arms 587 and 614 are beyond the plates 595 and 620. By meansof the cranks 586 and 618 the arms are rotated in opposite directionsand the knives move against the sides of the tire adjacent the base thussevering` the strips previously cut by the knives 569. Following thisoperation the shafts 585 and .612, and the lever 465 are moved to theirinoperative positions. The trimmed tire is now released from the jaws 77by movement of the rod 102 and the cam 101 by means of the fluid motor113 after which it is removed from the machine. Movement of the handlever 465 andthe carriage 450 also affects an opening of the switch 685and therefore a deenergization of the motor 25. 1

From the foregoing description it is apparent that a machine has beenprovi dedfor Vtrimming tires to predetermined dimensions which obviatesthe practice of cutting and weighing all extruded stock before applyingit on atire supporting base band. lt is apparent also that a machine hasbeen provided which is adaptable to any size tire and which is capableof trimming a tire to any dimensions required.

the invention is notrso limited, but that various modifications may bemade therein without departing from the spirit of the inventi-on or fromthe scope of the lappended claims.

l/hat l claim is 1. A machine for trimming a tire comprising a rotatablesupport for the tire, means forro-tating the support, a mechanism Vfortrimming an outer peripheral portion of the tire and movable to and fromoperative positions relative to the tire., means for moving saidmechanism, andV motor control means in the path of movement of themechanism for controlling the rotating means for the support.

2. A machine for trimming a tire compris-v ing a rotatable support forthe tire, means for rotating the support, a mechanism for trimming anouter peripheral portionv of the `tire and including a motor, saidmechanism,

being movable to and from operative positions relative to the tire,means for moving said mechanism, and motor control means in vthe path ofmovementof the mechanism.

3. A machine for trimming a tire comprising a rotatable support for thetire, means including a-motor for rotating the support, a mechanism fortrimming the outer peripheral portion of the tire, and including amotor,

said mechanism being movable to and from` operative positions relativeto the tire, means for moving the mechanism, and motor control means inthe path of movement o-f said mechanism.

4. A machine for trimming a tire comprising a rotatable support for thetire, selective motors for rotating the support, mechanism for trimmingthe tread `portion of the tire,

Asaid mechanism also being adapted to be operated while one of saidmotorsis in operation, means for trimming the sides of the tire, andadapted to be operated while the other motor isin operation, means formoving the tread trimming mechanism, and motor control means in the pathof movement of A eration, means for trimming the sides of the p tire andadapted to be operated, While. the i other selective motor is inoperation, means for moving the tread trimming mechanism, and motorcontrol means in the path of movement of said mechanism.

6. VA machine for trimming a tire comprising a. rotatable support forthe tire, means for rotating the support, a mechanism for trimming anouter peripheral portion of the tire, saidmechanism includingazplurality of si;

pulleys, an endless cutting member trained over the pulleys, and meansfor rotating the pulleys to operate the cutting member.

7. A machine for trimming a tirel comprising a rotatable sup-port fo-rthe tire, means for rotating the support, a mechanism for trimming anouterperipheral portion of the tire, said mechanism including aplurality of pulleys, an endless cutting member trained over thepulleys, and means for rotating the pulleys to operate the cuttingmember, said cutting member operating in Ya direction transversely o-fthe plane of rotation of the tire.

8. A machine for trimming a tire comprising a rotatable support for thetire,means for rotating the support, a mechanism -for trimmingl an outerperipheral portion of the tire, said mechanism including a plurality ofpulleys, and endless cutting member trained over the pulleys, means forrotating the pulleys to operate the cutting member, and means foradjusting said pulleys relatively.

Y 9. A machine for trimming fa tire comprising a rotatable support forthe tire, means for rotating the support, a mechanism for trimming anouter peripheral portion of the tire, said mechanismbeing mounted on avertically slidable memberin said support, and

means for moving said member.

10. A machine for trimming a tire comprising a rotatable support for thetire, means for rotating the support, a mechanism for trimming an outerperipheral portion of the tire, said mechanism being mounted on avertically slidable member in said support, and means for moving saidmember, said last mentioned means including a fluid operated motoroperatively connected to the member.

movable portion, means for moving said movable portion of the base, amember vertically slidably mounted on the base, means for moving saidslidable member, a tire trimming mechanism mounted on said member, andmeans for operating said mechanism.

14. A machine for trimming a tire comprising a rotatable support for thetire, means for rotating the support, a mechanism for trimming an outerperipheral portion of the tire, said mechanism including a plurality ofpulleys, an endless cuttingmember trained over the pulleys, means forrotating the pulleys to operate the cutting member, and conveyor meansoperating simultaneously with the cutting mechanism for conveying awaythe strips of rubber cut from the tire.

15. In a machine for trimming tires, a base comprising a stationaryportion and a laterally movable portion, means for adjustably moving themovable portion of the base relative to the stationary portion, aplurality of pulleys rotatably mounted on the movable portion, anendless tire trimming member trained about the pulleys and means foroperating the pulleys and trimming member.

In witness whereof, I have hereunto signed my name at Akron, in thecounty of Summit and State of Ohio, U. S. A., this 20th day ofSeptember, 1928.

' JORGEN I. I-IAASE.

11. In a machine for trimming tires, a bas'e r having an upwardlyextending rotatable shaft thereon, a member vertically slidably mountedon said base and loosely receiving the shaft, means for verticallymoving said member, a pair of spaced pulleys mounted rotatably on saidmember, one of the pulleys being feather keyed onto the shaft, anendless tire trimming member trained about the Y pulleys, and means forrotating the shaft.

12. In a machine for trimming tires. a base comprising a stationaryportion and a laterally movable portion, means for adjustably moving themovable portion of the base relative to the stationary portion, arotatable shaft extending upwardly from the movable portion of the base,a member vertically slidably mounted on thek movable portion of the baseand loosely receiving the shaft, means for vertically moving saidmember, spaced pulleys mounted rotatably on said member, one of thepulleys being keyed onto the shaft, an endless tire trimming membertrained about the pulleys, and means for rotating the shaft. l

13. In a tire trimming machine, a base comprising a stationary portionand a laterally

